1971 Buick Riviera. The Riviera muscle car was radically redesigned for the 1971 model year with flowing and dramatic “boat-tail” styling. The 1971 Riviera also features GM’s “Full-Flo” ventilation system and two large deck lid louvers are prominent on the trunk lid. (Unfortunately, under certain conditions a vacuum was created that sucked rain and exhaust back into the car and the “Full-Flo” ventilation was redesigned and the louvers were removed from trunk lid for the 1972 model year.)
